A hyperbolic distinction that only a blithering idiot could not make. Also ass from a hole in the ground, shit from shinola, can't fight his way out of a paper bag, dumb as a rock.

v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)